Nut-lock.



No. 767,203. PATENTED AUG. 9,'1904.

W. H. BURNETT.

NUT LOCK.

APPLICATION FILED JAN. 12, 1904.

' N0 MODEL.

WITNESSES: U ,NVENmfl willie/11H 51072665 A770RNE rs;

UNITED STATES Patented August 9, 1904.

PATENT OFFICE.

IVILLIAM H. BURNETT, OF SPRINGFIELD, ILLINOIS, ASSIGNOR OF ONE- HALF TOLEROY R. LAWSON AND JOSEPH H. BASSETT, OF SPRING- FIELD, ILLINOIS, ANDBENJAMIN M. BROOOHUS, OF FORT SMITH,

ARKANSAS.

NUT--LOCK.

SPECIFICATION forming part of Letters Patent No. 767,203, dated August9, 1904.

Application filed January 12, 1904. Serial No. 188,773. (No model.)

To all whom it may concern/.-

Be it known that I, WILLIAM H. BURNETT, a citizen of the United States,and a resident of Springfield, in the county of Sangamon and State ofIllinois, have invented a new and Improved Nut-Lock, of which thefollowing is a full, clear, and exact description.

This invention relates to nut-locks of a class in which the nut is heldin locked condition on the thread of the bolt by means carried by thenut and adapted for interlocking engagement with a groove in the bolt,and has for its object to provide novel details of construction for anut-lock of the class indicated which adapt it for convenient adjustmenteither to lock the nut at a desired point on the threaded body of thebolt or release the nut to permit its removal from the bolt withoutinjury to the nut, the bolt, or the locking device.

The invention consists in the novel construction and combination ofparts. as is hereinafter described, and defined in the appended claim.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a perspective view of a bolt and a nut thereon held fromreversed turning movement by the improved nut-lock. Fig. 2 is alongitudinal sectional view of the bolt and nut, showing the improvednut-lock on the nut and engaging the bolt, the section beingsubstantially on the line 2 2 in Fig. 3; and Fig. 3 is a transversesectional view of the bolt and nut, exposing the improvednut-lock, thesection being substantially on the line 3 3 in Fig. 2.

The bolt 5 is shown to illustrate the improved means for holding a nut 6from retraction on the bolt, may be of any dimensions, and the thread athereon may be of coarse or fine pitch, as may be preferred. Anysuitable number of grooves Z) are formed in the threaded portion of thebolt-body 5, two of such grooves being shown opposite each other andeach extending longitudinally in the form of an angular channel ofsuitable depth, said grooves or channels respectively having an uprightside wall 0 and a laterally-inclined side Wall 0.

A portion of one corner of the nut 6, which is represented as square incontour, is removed, so as to produce a flat place thereon, andcentrally in said flattened formation a circular chamber (Z of a properdepthis formed, which at its base intersects a channel 6, eX- tendingfrom the end wall of the nut adjacent to the flattened surface of thecorner of the same toward the other end of said nut and cuts away thethread in the nut, the width of the channel being preferably equal tothat of each angular groove 6 where the groove and channel meet, asindicated iniFig. 3.

In the chamber (Z and transverse channel a the body of a locking-clog isplaced, said dog consisting of a latch-head h, which loosely occupies aportion of the channel e, and a shank it, that projects vertically fromthe latchhead and centrally within the chamber. The lower edge portionof the latch-head it is in the form of a ratchet-tooth and fits looselyin either groove 6, opposite which it may be positioned, there being atraight wall at the proper side of the latch-h d to have contact withthe upright side 0 of a oove in which it is seated and a sloped surfacewhich corresponds with the inclined surface 0, so that the latch-headmay be seated at any point along either groove 6 and have interlockedengagement with the bolt-body. The inner lower corner of the latch-headIt is reduced, so as to form a slope if, that will permit the nut to bescrewed upon the bolt-thread, which will raise the dog when the nut isrotated for screwing it upon the bolt.

A spiral spring 2', that encircles the shank it, occupies the chamber dand seats upon the latch-head it.

In a flat-bottomed recess formed in the flat surface at the corner ofthe nut having the chamber cZ therein and that has opposite undercutsides a cap-plate m, having correspondingly-beveled side edges, isclosely fitted and secured, preferably by riveting over the endsthereof, and in the cap-plate a perforation is formed, through whichloosely projects the upper end portion of the shank h.

Upon the projecting end of the shank h a fiat head-plate 72 is securedby riveting the latter over upon the upper edge of the perforation inthe head-plate, through which the end of the shank has been upwardlyinserted, as is clearly shown in Figs. 2 and 3. The provision of thecap-plate m and head-plate 7& serves to secure the locking-dog in thenut free to reciprocate a limited distance therein, the latch-head it,owing to the length of the shank and pressure of the spring t',projecting into the threaded bore of the nut 6 when the latter is not inplace on the bolt-body.

In use, the bolt 5 being placed in position for service to secure partsof machinery or of a railroad-track together by the employment of thenut 6 as a cooperating means, the nut is mounted upon the bolt and thelatch-head 7t permitted to rest on the threads (6 of the bolt. It willbe seen that the sloped or inclined side 0' of each groove in thebolt-body is so arranged with regard to the right-hand turns of thethread that the nut 6 may be freely screwed upon the bolt, so as to bearagainst the object it is to clamp, as the latchdog head It will yield,but under pressure of the spring 6 will become seated in each groove 6it crosses, and to lock the nut should be permitted to have such anengagement with a groove when the nut is fully drawn up against thematerial it is to hold in place.

The ratchet-tooth form given to the edge of the latch-head it adapts theupright wall of the latchhead to have contact with the similar wall a ofthe engaged groove 6, which will prevent a release of the dog and insurethe nut remaining in locked condition on the bolt until it is releasedby lifting the dog away from the groove and holding it thus retracted byan engagement of any suitable wedge or the like with the cap-plate 72.

It will be noticed that by placing the latchdog in a chamber at a cornerof the nut more room is available than in a side of the nut and the nutis not weakened by the formation of the chamber. It will also be evidentthat there are no projections from the nut that will obstruct the use ofa wrench for screwing the nut to tighten or release it.

Having described my invention, I claim as new and desire to secure byLetters Patent The combination with a threaded bolt, having a pluralityof spaced grooves therein, each groove being formed with a verticalside, and an inclined side that trends in direction of the turns of thebolt-thread, of a rectangular nut adapted to screw upon the bolt, saidnut being flattened at one corner near an end wall of the nut and formedwith a chamber in said corner, intersecting a longitudinal channel thatcuts through the thread in the nut, a latch-head having its lower endratchet-tooth shaped and adapted to fit into either groove in the bolt,said head fitting loosely in the channel, a shank projecting from thelatchhead into and through the chamber, a coiled spring in the chamber,encircling the shank and seating upon the latch-head, a dovetailedcap-plate closing the upper end of the chamber and through which theshank passes, and a plate-like head secured upon the upper end of theshank.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

' WILLIAM H. BURNETT.

I/Vitnesses:

N. DUBoIs, L. R. LAWSON.

